Ansible Study Notes

First, the basic introduction of Ansible:

2. What's the ansible type?
   

   Ansible is a very simple IT operations automation tool engine for configuration management, application deployment, internal service orchestration, and more, for hundreds of thousands of managed nodes, based on Python development. She does not need an agent and is easy to deploy, with no other security infrastructure/configuration requirements other than SSH. She uses a very simple language (YAML) so that you can write your own automated job scripts.

4. How does the ansible work?

   Ansible connects to the managed machine and pushes an application called "Modules" to the managed machine, Ansible then executes the modules on the managed machine (via SSH by default) and removes them when done.

6. Advantages of Ansible:

   1, playbooks based on Yaml, easy to learn

   2, based on push, no need to install any program on the managed machine

   3, the controlled machine can be hundreds of thousands, the greater the scope of management cost efficiency better

   4, built-in a large number of modules, and can use "any language" development of custom modules

7. ansibleis the new automated Operations tool, based onPythondeveloped and assembled a number of operations tools (puppet,Cfengine,Chef,func,Fabric), it realizes the functions of batch system configuration, batch program deployment, batch Run command and so on. ansibleis based on modules, and does not have the ability to deploy in bulk. The real batch deployment isansibleThe module that is running,ansiblejust provide a framework. Mainly include:

   : responsible and monitored to achieve communication;

   " : Specifies the host of the operation, is a host that defines the monitoring within a configuration file;

   , various module core modules, module, custom module;

   (5) , Playbook : When a script performs multiple tasks, it is not necessary to have the node run multiple tasks at once.

Second, how to install ansible?

In fact, the installation of ansible is not complicated, just a simple command will be done. I've tried several methods before, and I've seen several versions of the Absible installation documentation that have failed.

The following describes how to install Ansible.

Download new repo to/etc/yum.repos.d/

Epel (RHEL 7)

Wget-o/etc/yum.repos.d/epel.repo Http://mirrors.aliyun.com/repo/epel-7.repo

Add a Epel source to it.

Then go straight to yum install ansible-y !!

Third, some simple module command of ansible:

Primary server: 172.25.44.250

Prepare 3 hosts for experimental use: 172.25.44.1 172.25.44.2 172.25.44.3

Vim/etc/ansible/hosts

[Xiaoze]

172.25.44.1

172.25.44.2

[LZK]

172.25.44.3

On the primary server: Ssh-keygen generate key

[[email protected] ansible]# ssh-copy-id-i [email protected] pass the key to the other 3 experimental hosts

View Ansible supported modules: ansible-doc-l

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View a module: ansible-doc-s copy

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Ansible Command Application Basics:

Syntax: Ansible

-F Forks: Number of concurrent threads started;

-M Module_name: The module to be used;

-A args: module-specific parameters;

Basic test:

Command module:

Ansible all-m command-a ' Date '

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View passwd file:

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Cron module:

To have the managed node generate a regular automated OPS plan:

Let two hosts run every 10 minutes echo Hello World

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Ansible xiaoze-a ' crontab-l ' by command to see if a task is generated

Removal task: ansible xiaoze-m cron-a ' minute= "*/10" job= "/bin/echo Hello World" name= "Test cron Job" state=absent "

Create User: Add state=absent after user delete users

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Delete User: Ansible all-m user-a ' name= "user1" State=absent '

Groups Management: Group

To create a MySQL group account:

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Create a MySQL user and add it to the MySQL group:

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Copy

src=: Define local source file path

dest=: Define remote destination file path

Content=: Replaces src=, which is used to generate the target file directly with the information specified here

Copy the/etc/passwd file to the/mnt/:

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Content directly generates file contents:

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File

Change the owner of the copied file to MySQL:

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Ping module:

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Service

Managing node services and startup status

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If the service is not turned on, execute the following command to open it:

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Shell

Shell is recommended for piping complex command functions

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Yum

Install the package, uninstall the words in the back plus state=absent

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Uninstall is: ansible all-m yum-a "Name=bind state=absent"

This article is from the "11721816" blog, please be sure to keep this source http://zzkkk.blog.51cto.com/11721816/1851780

Ansible Study Notes